Five
Sagar
it is usually with 5 arms
sea lilies and feather stars
Echinoderms can only be found in water, as they are aquatic. Some characteristics of Echinoderms are: Hard Skin, have arms or spines, have 5 body parts, organs found towards centre of body. Examples: Star Fish, Sea Cucumber, Sea Urchin
Echinoderms are in the Animalia kingdom.
The scientific name for Echinoderms is Echinodermata.
ctenophorains(jellysfish) are spherical in shape much like a ball hence show radial symmetry. echinoderms(starfish) generally are flatter and have 5 arms hence are called pentaradial symmetry (can be cut in only 5 directions)
Echinoderms belong to the phylum Echinodermata.
They have fivefold radial symmetry, a calcareous skeleton, and tube feet operated by fluid pressure.
As of yet, there is no known species of parasitic echinoderms.
Yes Eventually echinoderms do live in water.
Echinodermates possess a water vascular system.